Tool clamp with adjusting function for crank arm machining

The utility model relates to the technical field of crank arm machining, in particular to a crank arm machining tool clamp with an adjusting function. The clamping mechanism is used for clamping crank arms with different sizes and is arranged at the top end of the base; wherein the clamping mechanism comprises a mounting frame fixedly connected to one side of the base, the inner wall of the mounting frame is rotationally connected with a two-way screw rod, and the surface of the two-way screw rod is in threaded connection with a moving block; when the crank arm is clamped, the two positioning plates get close to each other and drive the suction cup to adsorb the surface of the crank arm, clamping operation on the crank arms of different sizes can be achieved, the overall practicability of the device is improved, and meanwhile when the crank arms of different sizes are positioned, the suction cup, the piston rod and the air cylinder interact with each other, so that the positioning precision is improved. Cente